1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* AF_RXRPC internal definitions 3 * 4 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. 5 * Written by David Howells (dhowells@redhat.com) 6 */ 7 8 #include <linux/atomic.h> 9 #include <linux/seqlock.h> 10 #include <net/net_namespace.h> 11 #include <net/netns/generic.h> 12 #include <net/sock.h> 13 #include <net/af_rxrpc.h> 14 #include "protocol.h" 15 16 #if 0 17 #define CHECK_SLAB_OKAY(X) \ 18 BUG_ON(atomic_read((X)) >> (sizeof(atomic_t) - 2) == \ 19 (POISON_FREE << 8 | POISON_FREE)) 20 #else 21 #define CHECK_SLAB_OKAY(X) do {} while (0) 22 #endif 23 24 #define FCRYPT_BSIZE 8 25 struct rxrpc_crypt { 26 union { 27 u8 x[FCRYPT_BSIZE]; 28 __be32 n[2]; 29 }; 30 } __attribute__((aligned(8))); 31 32 #define rxrpc_queue_work(WS) queue_work(rxrpc_workqueue, (WS)) 33 #define rxrpc_queue_delayed_work(WS,D) \ 34 queue_delayed_work(rxrpc_workqueue, (WS), (D)) 35 36 struct rxrpc_connection; 37 38 /* 39 * Mark applied to socket buffers in skb->mark. skb->priority is used 40 * to pass supplementary information. 41 */ 42 enum rxrpc_skb_mark { 43 RXRPC_SKB_MARK_REJECT_BUSY, /* Reject with BUSY */ 44 RXRPC_SKB_MARK_REJECT_ABORT, /* Reject with ABORT (code in skb->priority) */ 45 }; 46 47 /* 48 * sk_state for RxRPC sockets 49 */ 50 enum { 51 RXRPC_UNBOUND = 0, 52 RXRPC_CLIENT_UNBOUND, /* Unbound socket used as client */ 53 RXRPC_CLIENT_BOUND, /* client local address bound */ 54 RXRPC_SERVER_BOUND, /* server local address bound */ 55 RXRPC_SERVER_BOUND2, /* second server local address bound */ 56 RXRPC_SERVER_LISTENING, /* server listening for connections */ 57 RXRPC_SERVER_LISTEN_DISABLED, /* server listening disabled */ 58 RXRPC_CLOSE, /* socket is being closed */ 59 }; 60 61 /* 62 * Per-network namespace data. 63 */ 64 struct rxrpc_net { 65 struct proc_dir_entry *proc_net; /* Subdir in /proc/net */ 66 u32 epoch; /* Local epoch for detecting local-end reset */ 67 struct list_head calls; /* List of calls active in this namespace */ 68 rwlock_t call_lock; /* Lock for ->calls */ 69 atomic_t nr_calls; /* Count of allocated calls */ 70 71 atomic_t nr_conns; 72 struct list_head conn_proc_list; /* List of conns in this namespace for proc */ 73 struct list_head service_conns; /* Service conns in this namespace */ 74 rwlock_t conn_lock; /* Lock for ->conn_proc_list, ->service_conns */ 75 struct work_struct service_conn_reaper; 76 struct timer_list service_conn_reap_timer; 77 78 unsigned int nr_client_conns; 79 unsigned int nr_active_client_conns; 80 bool kill_all_client_conns; 81 bool live; 82 spinlock_t client_conn_cache_lock; /* Lock for ->*_client_conns */ 83 spinlock_t client_conn_discard_lock; /* Prevent multiple discarders */ 84 struct list_head waiting_client_conns; 85 struct list_head active_client_conns; 86 struct list_head idle_client_conns; 87 struct work_struct client_conn_reaper; 88 struct timer_list client_conn_reap_timer; 89 90 struct list_head local_endpoints; 91 struct mutex local_mutex; /* Lock for ->local_endpoints */ 92 93 DECLARE_HASHTABLE (peer_hash, 10); 94 spinlock_t peer_hash_lock; /* Lock for ->peer_hash */ 95 96 #define RXRPC_KEEPALIVE_TIME 20 /* NAT keepalive time in seconds */ 97 u8 peer_keepalive_cursor; 98 time64_t peer_keepalive_base; 99 struct list_head peer_keepalive[32]; 100 struct list_head peer_keepalive_new; 101 struct timer_list peer_keepalive_timer; 102 struct work_struct peer_keepalive_work; 103 }; 104 105 /* 106 * Service backlog preallocation. 107 * 108 * This contains circular buffers of preallocated peers, connections and calls 109 * for incoming service calls and their head and tail pointers. This allows 110 * calls to be set up in the data_ready handler, thereby avoiding the need to 111 * shuffle packets around so much. 112 */ 113 struct rxrpc_backlog { 114 unsigned short peer_backlog_head; 115 unsigned short peer_backlog_tail; 116 unsigned short conn_backlog_head; 117 unsigned short conn_backlog_tail; 118 unsigned short call_backlog_head; 119 unsigned short call_backlog_tail; 120 #define RXRPC_BACKLOG_MAX 32 121 struct rxrpc_peer *peer_backlog[RXRPC_BACKLOG_MAX]; 122 struct rxrpc_connection *conn_backlog[RXRPC_BACKLOG_MAX]; 123 struct rxrpc_call *call_backlog[RXRPC_BACKLOG_MAX]; 124 }; 125 126 /* 127 * RxRPC socket definition 128 */ 129 struct rxrpc_sock { 130 /* WARNING: sk has to be the first member */ 131 struct sock sk; 132 rxrpc_notify_new_call_t notify_new_call; /* Func to notify of new call */ 133 rxrpc_discard_new_call_t discard_new_call; /* Func to discard a new call */ 134 struct rxrpc_local *local; /* local endpoint */ 135 struct rxrpc_backlog *backlog; /* Preallocation for services */ 136 spinlock_t incoming_lock; /* Incoming call vs service shutdown lock */ 137 struct list_head sock_calls; /* List of calls owned by this socket */ 138 struct list_head to_be_accepted; /* calls awaiting acceptance */ 139 struct list_head recvmsg_q; /* Calls awaiting recvmsg's attention */ 140 rwlock_t recvmsg_lock; /* Lock for recvmsg_q */ 141 struct key *key; /* security for this socket */ 142 struct key *securities; /* list of server security descriptors */ 143 struct rb_root calls; /* User ID -> call mapping */ 144 unsigned long flags; 145 #define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */ 146 rwlock_t call_lock; /* lock for calls */ 147 u32 min_sec_level; /* minimum security level */ 148 #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT 149 bool exclusive; /* Exclusive connection for a client socket */ 150 u16 second_service; /* Additional service bound to the endpoint */ 151 struct { 152 /* Service upgrade information */ 153 u16 from; /* Service ID to upgrade (if not 0) */ 154 u16 to; /* service ID to upgrade to */ 155 } service_upgrade; 156 sa_family_t family; /* Protocol family created with */ 157 struct sockaddr_rxrpc srx; /* Primary Service/local addresses */ 158 struct sockaddr_rxrpc connect_srx; /* Default client address from connect() */ 159 }; 160 161 #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk) 162 163 /* 164 * CPU-byteorder normalised Rx packet header. 165 */ 166 struct rxrpc_host_header { 167 u32 epoch; /* client boot timestamp */ 168 u32 cid; /* connection and channel ID */ 169 u32 callNumber; /* call ID (0 for connection-level packets) */ 170 u32 seq; /* sequence number of pkt in call stream */ 171 u32 serial; /* serial number of pkt sent to network */ 172 u8 type; /* packet type */ 173 u8 flags; /* packet flags */ 174 u8 userStatus; /* app-layer defined status */ 175 u8 securityIndex; /* security protocol ID */ 176 union { 177 u16 _rsvd; /* reserved */ 178 u16 cksum; /* kerberos security checksum */ 179 }; 180 u16 serviceId; /* service ID */ 181 } __packed; 182 183 /* 184 * RxRPC socket buffer private variables 185 * - max 48 bytes (struct sk_buff::cb) 186 */ 187 struct rxrpc_skb_priv { 188 atomic_t nr_ring_pins; /* Number of rxtx ring pins */ 189 u8 nr_subpackets; /* Number of subpackets */ 190 u8 rx_flags; /* Received packet flags */ 191 #define RXRPC_SKB_INCL_LAST 0x01 /* - Includes last packet */ 192 #define RXRPC_SKB_TX_BUFFER 0x02 /* - Is transmit buffer */ 193 union { 194 int remain; /* amount of space remaining for next write */ 195 196 /* List of requested ACKs on subpackets */ 197 unsigned long rx_req_ack[(RXRPC_MAX_NR_JUMBO + BITS_PER_LONG - 1) / 198 BITS_PER_LONG]; 199 }; 200 201 struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */ 202 }; 203 204 #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb) 205 206 /* 207 * RxRPC security module interface 208 */ 209 struct rxrpc_security { 210 const char *name; /* name of this service */ 211 u8 security_index; /* security type provided */ 212 213 /* Initialise a security service */ 214 int (*init)(void); 215 216 /* Clean up a security service */ 217 void (*exit)(void); 218 219 /* initialise a connection's security */ 220 int (*init_connection_security)(struct rxrpc_connection *); 221 222 /* prime a connection's packet security */ 223 int (*prime_packet_security)(struct rxrpc_connection *); 224 225 /* impose security on a packet */ 226 int (*secure_packet)(struct rxrpc_call *, 227 struct sk_buff *, 228 size_t, 229 void *); 230 231 /* verify the security on a received packet */ 232 int (*verify_packet)(struct rxrpc_call *, struct sk_buff *, 233 unsigned int, unsigned int, rxrpc_seq_t, u16); 234 235 /* Locate the data in a received packet that has been verified. */ 236 void (*locate_data)(struct rxrpc_call *, struct sk_buff *, 237 unsigned int *, unsigned int *); 238 239 /* issue a challenge */ 240 int (*issue_challenge)(struct rxrpc_connection *); 241 242 /* respond to a challenge */ 243 int (*respond_to_challenge)(struct rxrpc_connection *, 244 struct sk_buff *, 245 u32 *); 246 247 /* verify a response */ 248 int (*verify_response)(struct rxrpc_connection *, 249 struct sk_buff *, 250 u32 *); 251 252 /* clear connection security */ 253 void (*clear)(struct rxrpc_connection *); 254 }; 255 256 /* 257 * RxRPC local transport endpoint description 258 * - owned by a single AF_RXRPC socket 259 * - pointed to by transport socket struct sk_user_data 260 */ 261 struct rxrpc_local { 262 struct rcu_head rcu; 263 atomic_t active_users; /* Number of users of the local endpoint */ 264 atomic_t usage; /* Number of references to the structure */ 265 struct rxrpc_net *rxnet; /* The network ns in which this resides */ 266 struct list_head link; 267 struct socket *socket; /* my UDP socket */ 268 struct work_struct processor; 269 struct rxrpc_sock __rcu *service; /* Service(s) listening on this endpoint */ 270 struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */ 271 struct sk_buff_head reject_queue; /* packets awaiting rejection */ 272 struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */ 273 struct rb_root client_conns; /* Client connections by socket params */ 274 spinlock_t client_conns_lock; /* Lock for client_conns */ 275 spinlock_t lock; /* access lock */ 276 rwlock_t services_lock; /* lock for services list */ 277 int debug_id; /* debug ID for printks */ 278 bool dead; 279 bool service_closed; /* Service socket closed */ 280 struct sockaddr_rxrpc srx; /* local address */ 281 }; 282 283 /* 284 * RxRPC remote transport endpoint definition 285 * - matched by local endpoint, remote port, address and protocol type 286 */ 287 struct rxrpc_peer { 288 struct rcu_head rcu; /* This must be first */ 289 atomic_t usage; 290 unsigned long hash_key; 291 struct hlist_node hash_link; 292 struct rxrpc_local *local; 293 struct hlist_head error_targets; /* targets for net error distribution */ 294 struct rb_root service_conns; /* Service connections */ 295 struct list_head keepalive_link; /* Link in net->peer_keepalive[] */ 296 time64_t last_tx_at; /* Last time packet sent here */ 297 seqlock_t service_conn_lock; 298 spinlock_t lock; /* access lock */ 299 unsigned int if_mtu; /* interface MTU for this peer */ 300 unsigned int mtu; /* network MTU for this peer */ 301 unsigned int maxdata; /* data size (MTU - hdrsize) */ 302 unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */ 303 int debug_id; /* debug ID for printks */ 304 struct sockaddr_rxrpc srx; /* remote address */ 305 306 /* calculated RTT cache */ 307 #define RXRPC_RTT_CACHE_SIZE 32 308 spinlock_t rtt_input_lock; /* RTT lock for input routine */ 309 ktime_t rtt_last_req; /* Time of last RTT request */ 310 u64 rtt; /* Current RTT estimate (in nS) */ 311 u64 rtt_sum; /* Sum of cache contents */ 312 u64 rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* Determined RTT cache */ 313 u8 rtt_cursor; /* next entry at which to insert */ 314 u8 rtt_usage; /* amount of cache actually used */ 315 316 u8 cong_cwnd; /* Congestion window size */ 317 }; 318 319 /* 320 * Keys for matching a connection. 321 */ 322 struct rxrpc_conn_proto { 323 union { 324 struct { 325 u32 epoch; /* epoch of this connection */ 326 u32 cid; /* connection ID */ 327 }; 328 u64 index_key; 329 }; 330 }; 331 332 struct rxrpc_conn_parameters { 333 struct rxrpc_local *local; /* Representation of local endpoint */ 334 struct rxrpc_peer *peer; /* Remote endpoint */ 335 struct key *key; /* Security details */ 336 bool exclusive; /* T if conn is exclusive */ 337 bool upgrade; /* T if service ID can be upgraded */ 338 u16 service_id; /* Service ID for this connection */ 339 u32 security_level; /* Security level selected */ 340 }; 341 342 /* 343 * Bits in the connection flags. 344 */ 345 enum rxrpc_conn_flag { 346 RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */ 347 RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */ 348 RXRPC_CONN_IN_CLIENT_CONNS, /* Conn is in local->client_conns */ 349 RXRPC_CONN_EXPOSED, /* Conn has extra ref for exposure */ 350 RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */ 351 RXRPC_CONN_COUNTED, /* Counted by rxrpc_nr_client_conns */ 352 RXRPC_CONN_PROBING_FOR_UPGRADE, /* Probing for service upgrade */ 353 RXRPC_CONN_FINAL_ACK_0, /* Need final ACK for channel 0 */ 354 RXRPC_CONN_FINAL_ACK_1, /* Need final ACK for channel 1 */ 355 RXRPC_CONN_FINAL_ACK_2, /* Need final ACK for channel 2 */ 356 RXRPC_CONN_FINAL_ACK_3, /* Need final ACK for channel 3 */ 357 }; 358 359 #define RXRPC_CONN_FINAL_ACK_MASK ((1UL << RXRPC_CONN_FINAL_ACK_0) | \ 360 (1UL << RXRPC_CONN_FINAL_ACK_1) | \ 361 (1UL << RXRPC_CONN_FINAL_ACK_2) | \ 362 (1UL << RXRPC_CONN_FINAL_ACK_3)) 363 364 /* 365 * Events that can be raised upon a connection. 366 */ 367 enum rxrpc_conn_event { 368 RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */ 369 }; 370 371 /* 372 * The connection cache state. 373 */ 374 enum rxrpc_conn_cache_state { 375 RXRPC_CONN_CLIENT_INACTIVE, /* Conn is not yet listed */ 376 RXRPC_CONN_CLIENT_WAITING, /* Conn is on wait list, waiting for capacity */ 377 RXRPC_CONN_CLIENT_ACTIVE, /* Conn is on active list, doing calls */ 378 RXRPC_CONN_CLIENT_UPGRADE, /* Conn is on active list, probing for upgrade */ 379 RXRPC_CONN_CLIENT_CULLED, /* Conn is culled and delisted, doing calls */ 380 RXRPC_CONN_CLIENT_IDLE, /* Conn is on idle list, doing mostly nothing */ 381 RXRPC_CONN__NR_CACHE_STATES 382 }; 383 384 /* 385 * The connection protocol state. 386 */ 387 enum rxrpc_conn_proto_state { 388 RXRPC_CONN_UNUSED, /* Connection not yet attempted */ 389 RXRPC_CONN_CLIENT, /* Client connection */ 390 RXRPC_CONN_SERVICE_PREALLOC, /* Service connection preallocation */ 391 RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */ 392 RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */ 393 RXRPC_CONN_SERVICE, /* Service secured connection */ 394 RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */ 395 RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */ 396 RXRPC_CONN__NR_STATES 397 }; 398 399 /* 400 * RxRPC connection definition 401 * - matched by { local, peer, epoch, conn_id, direction } 402 * - each connection can only handle four simultaneous calls 403 */ 404 struct rxrpc_connection { 405 struct rxrpc_conn_proto proto; 406 struct rxrpc_conn_parameters params; 407 408 atomic_t usage; 409 struct rcu_head rcu; 410 struct list_head cache_link; 411 412 spinlock_t channel_lock; 413 unsigned char active_chans; /* Mask of active channels */ 414 #define RXRPC_ACTIVE_CHANS_MASK ((1 << RXRPC_MAXCALLS) - 1) 415 struct list_head waiting_calls; /* Calls waiting for channels */ 416 struct rxrpc_channel { 417 unsigned long final_ack_at; /* Time at which to issue final ACK */ 418 struct rxrpc_call __rcu *call; /* Active call */ 419 unsigned int call_debug_id; /* call->debug_id */ 420 u32 call_id; /* ID of current call */ 421 u32 call_counter; /* Call ID counter */ 422 u32 last_call; /* ID of last call */ 423 u8 last_type; /* Type of last packet */ 424 union { 425 u32 last_seq; 426 u32 last_abort; 427 }; 428 } channels[RXRPC_MAXCALLS]; 429 430 struct timer_list timer; /* Conn event timer */ 431 struct work_struct processor; /* connection event processor */ 432 union { 433 struct rb_node client_node; /* Node in local->client_conns */ 434 struct rb_node service_node; /* Node in peer->service_conns */ 435 }; 436 struct list_head proc_link; /* link in procfs list */ 437 struct list_head link; /* link in master connection list */ 438 struct sk_buff_head rx_queue; /* received conn-level packets */ 439 const struct rxrpc_security *security; /* applied security module */ 440 struct key *server_key; /* security for this service */ 441 struct crypto_sync_skcipher *cipher; /* encryption handle */ 442 struct rxrpc_crypt csum_iv; /* packet checksum base */ 443 unsigned long flags; 444 unsigned long events; 445 unsigned long idle_timestamp; /* Time at which last became idle */ 446 spinlock_t state_lock; /* state-change lock */ 447 enum rxrpc_conn_cache_state cache_state; 448 enum rxrpc_conn_proto_state state; /* current state of connection */ 449 u32 abort_code; /* Abort code of connection abort */ 450 int debug_id; /* debug ID for printks */ 451 atomic_t serial; /* packet serial number counter */ 452 unsigned int hi_serial; /* highest serial number received */ 453 u32 security_nonce; /* response re-use preventer */ 454 u32 service_id; /* Service ID, possibly upgraded */ 455 u8 size_align; /* data size alignment (for security) */ 456 u8 security_size; /* security header size */ 457 u8 security_ix; /* security type */ 458 u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */ 459 short error; /* Local error code */ 460 }; 461 462 static inline bool rxrpc_to_server(const struct rxrpc_skb_priv *sp) 463 { 464 return sp->hdr.flags & RXRPC_CLIENT_INITIATED; 465 } 466 467 static inline bool rxrpc_to_client(const struct rxrpc_skb_priv *sp) 468 { 469 return !rxrpc_to_server(sp); 470 } 471 472 /* 473 * Flags in call->flags. 474 */ 475 enum rxrpc_call_flag { 476 RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */ 477 RXRPC_CALL_HAS_USERID, /* has a user ID attached */ 478 RXRPC_CALL_IS_SERVICE, /* Call is service call */ 479 RXRPC_CALL_EXPOSED, /* The call was exposed to the world */ 480 RXRPC_CALL_RX_LAST, /* Received the last packet (at rxtx_top) */ 481 RXRPC_CALL_TX_LAST, /* Last packet in Tx buffer (at rxtx_top) */ 482 RXRPC_CALL_SEND_PING, /* A ping will need to be sent */ 483 RXRPC_CALL_PINGING, /* Ping in process */ 484 RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */ 485 RXRPC_CALL_BEGAN_RX_TIMER, /* We began the expect_rx_by timer */ 486 RXRPC_CALL_RX_HEARD, /* The peer responded at least once to this call */ 487 RXRPC_CALL_RX_UNDERRUN, /* Got data underrun */ 488 RXRPC_CALL_IS_INTR, /* The call is interruptible */ 489 }; 490 491 /* 492 * Events that can be raised on a call. 493 */ 494 enum rxrpc_call_event { 495 RXRPC_CALL_EV_ACK, /* need to generate ACK */ 496 RXRPC_CALL_EV_ABORT, /* need to generate abort */ 497 RXRPC_CALL_EV_RESEND, /* Tx resend required */ 498 RXRPC_CALL_EV_PING, /* Ping send required */ 499 RXRPC_CALL_EV_EXPIRED, /* Expiry occurred */ 500 RXRPC_CALL_EV_ACK_LOST, /* ACK may be lost, send ping */ 501 }; 502 503 /* 504 * The states that a call can be in. 505 */ 506 enum rxrpc_call_state { 507 RXRPC_CALL_UNINITIALISED, 508 RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */ 509 RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */ 510 RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */ 511 RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */ 512 RXRPC_CALL_SERVER_PREALLOC, /* - service preallocation */ 513 RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */ 514 RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */ 515 RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */ 516 RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */ 517 RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */ 518 RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */ 519 RXRPC_CALL_COMPLETE, /* - call complete */ 520 NR__RXRPC_CALL_STATES 521 }; 522 523 /* 524 * Call completion condition (state == RXRPC_CALL_COMPLETE). 525 */ 526 enum rxrpc_call_completion { 527 RXRPC_CALL_SUCCEEDED, /* - Normal termination */ 528 RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */ 529 RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */ 530 RXRPC_CALL_LOCAL_ERROR, /* - call failed due to local error */ 531 RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */ 532 NR__RXRPC_CALL_COMPLETIONS 533 }; 534 535 /* 536 * Call Tx congestion management modes. 537 */ 538 enum rxrpc_congest_mode { 539 RXRPC_CALL_SLOW_START, 540 RXRPC_CALL_CONGEST_AVOIDANCE, 541 RXRPC_CALL_PACKET_LOSS, 542 RXRPC_CALL_FAST_RETRANSMIT, 543 NR__RXRPC_CONGEST_MODES 544 }; 545 546 /* 547 * RxRPC call definition 548 * - matched by { connection, call_id } 549 */ 550 struct rxrpc_call { 551 struct rcu_head rcu; 552 struct rxrpc_connection *conn; /* connection carrying call */ 553 struct rxrpc_peer *peer; /* Peer record for remote address */ 554 struct rxrpc_sock __rcu *socket; /* socket responsible */ 555 struct rxrpc_net *rxnet; /* Network namespace to which call belongs */ 556 struct mutex user_mutex; /* User access mutex */ 557 unsigned long ack_at; /* When deferred ACK needs to happen */ 558 unsigned long ack_lost_at; /* When ACK is figured as lost */ 559 unsigned long resend_at; /* When next resend needs to happen */ 560 unsigned long ping_at; /* When next to send a ping */ 561 unsigned long keepalive_at; /* When next to send a keepalive ping */ 562 unsigned long expect_rx_by; /* When we expect to get a packet by */ 563 unsigned long expect_req_by; /* When we expect to get a request DATA packet by */ 564 unsigned long expect_term_by; /* When we expect call termination by */ 565 u32 next_rx_timo; /* Timeout for next Rx packet (jif) */ 566 u32 next_req_timo; /* Timeout for next Rx request packet (jif) */ 567 struct timer_list timer; /* Combined event timer */ 568 struct work_struct processor; /* Event processor */ 569 rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */ 570 struct list_head link; /* link in master call list */ 571 struct list_head chan_wait_link; /* Link in conn->waiting_calls */ 572 struct hlist_node error_link; /* link in error distribution list */ 573 struct list_head accept_link; /* Link in rx->acceptq */ 574 struct list_head recvmsg_link; /* Link in rx->recvmsg_q */ 575 struct list_head sock_link; /* Link in rx->sock_calls */ 576 struct rb_node sock_node; /* Node in rx->calls */ 577 struct sk_buff *tx_pending; /* Tx socket buffer being filled */ 578 wait_queue_head_t waitq; /* Wait queue for channel or Tx */ 579 s64 tx_total_len; /* Total length left to be transmitted (or -1) */ 580 __be32 crypto_buf[2]; /* Temporary packet crypto buffer */ 581 unsigned long user_call_ID; /* user-defined call ID */ 582 unsigned long flags; 583 unsigned long events; 584 spinlock_t lock; 585 spinlock_t notify_lock; /* Kernel notification lock */ 586 rwlock_t state_lock; /* lock for state transition */ 587 u32 abort_code; /* Local/remote abort code */ 588 int error; /* Local error incurred */ 589 enum rxrpc_call_state state; /* current state of call */ 590 enum rxrpc_call_completion completion; /* Call completion condition */ 591 atomic_t usage; 592 u16 service_id; /* service ID */ 593 u8 security_ix; /* Security type */ 594 u32 call_id; /* call ID on connection */ 595 u32 cid; /* connection ID plus channel index */ 596 int debug_id; /* debug ID for printks */ 597 unsigned short rx_pkt_offset; /* Current recvmsg packet offset */ 598 unsigned short rx_pkt_len; /* Current recvmsg packet len */ 599 600 /* Rx/Tx circular buffer, depending on phase. 601 * 602 * In the Rx phase, packets are annotated with 0 or the number of the 603 * segment of a jumbo packet each buffer refers to. There can be up to 604 * 47 segments in a maximum-size UDP packet. 605 * 606 * In the Tx phase, packets are annotated with which buffers have been 607 * acked. 608 */ 609 #define RXRPC_RXTX_BUFF_SIZE 64 610 #define RXRPC_RXTX_BUFF_MASK (RXRPC_RXTX_BUFF_SIZE - 1) 611 #define RXRPC_INIT_RX_WINDOW_SIZE 63 612 struct sk_buff **rxtx_buffer; 613 u8 *rxtx_annotations; 614 #define RXRPC_TX_ANNO_ACK 0 615 #define RXRPC_TX_ANNO_UNACK 1 616 #define RXRPC_TX_ANNO_NAK 2 617 #define RXRPC_TX_ANNO_RETRANS 3 618 #define RXRPC_TX_ANNO_MASK 0x03 619 #define RXRPC_TX_ANNO_LAST 0x04 620 #define RXRPC_TX_ANNO_RESENT 0x08 621 622 #define RXRPC_RX_ANNO_SUBPACKET 0x3f /* Subpacket number in jumbogram */ 623 #define RXRPC_RX_ANNO_VERIFIED 0x80 /* Set if verified and decrypted */ 624 rxrpc_seq_t tx_hard_ack; /* Dead slot in buffer; the first transmitted but 625 * not hard-ACK'd packet follows this. 626 */ 627 rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */ 628 u16 tx_backoff; /* Delay to insert due to Tx failure */ 629 630 /* TCP-style slow-start congestion control [RFC5681]. Since the SMSS 631 * is fixed, we keep these numbers in terms of segments (ie. DATA 632 * packets) rather than bytes. 633 */ 634 #define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN 635 u8 cong_cwnd; /* Congestion window size */ 636 u8 cong_extra; /* Extra to send for congestion management */ 637 u8 cong_ssthresh; /* Slow-start threshold */ 638 enum rxrpc_congest_mode cong_mode:8; /* Congestion management mode */ 639 u8 cong_dup_acks; /* Count of ACKs showing missing packets */ 640 u8 cong_cumul_acks; /* Cumulative ACK count */ 641 ktime_t cong_tstamp; /* Last time cwnd was changed */ 642 643 rxrpc_seq_t rx_hard_ack; /* Dead slot in buffer; the first received but not 644 * consumed packet follows this. 645 */ 646 rxrpc_seq_t rx_top; /* Highest Rx slot allocated. */ 647 rxrpc_seq_t rx_expect_next; /* Expected next packet sequence number */ 648 rxrpc_serial_t rx_serial; /* Highest serial received for this call */ 649 u8 rx_winsize; /* Size of Rx window */ 650 u8 tx_winsize; /* Maximum size of Tx window */ 651 bool tx_phase; /* T if transmission phase, F if receive phase */ 652 u8 nr_jumbo_bad; /* Number of jumbo dups/exceeds-windows */ 653 654 spinlock_t input_lock; /* Lock for packet input to this call */ 655 656 /* receive-phase ACK management */ 657 u8 ackr_reason; /* reason to ACK */ 658 rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */ 659 rxrpc_serial_t ackr_first_seq; /* first sequence number received */ 660 rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */ 661 rxrpc_seq_t ackr_consumed; /* Highest packet shown consumed */ 662 rxrpc_seq_t ackr_seen; /* Highest packet shown seen */ 663 664 /* ping management */ 665 rxrpc_serial_t ping_serial; /* Last ping sent */ 666 ktime_t ping_time; /* Time last ping sent */ 667 668 /* transmission-phase ACK management */ 669 ktime_t acks_latest_ts; /* Timestamp of latest ACK received */ 670 rxrpc_serial_t acks_latest; /* serial number of latest ACK received */ 671 rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */ 672 rxrpc_seq_t acks_lost_top; /* tx_top at the time lost-ack ping sent */ 673 rxrpc_serial_t acks_lost_ping; /* Serial number of probe ACK */ 674 }; 675 676 /* 677 * Summary of a new ACK and the changes it made to the Tx buffer packet states. 678 */ 679 struct rxrpc_ack_summary { 680 u8 ack_reason; 681 u8 nr_acks; /* Number of ACKs in packet */ 682 u8 nr_nacks; /* Number of NACKs in packet */ 683 u8 nr_new_acks; /* Number of new ACKs in packet */ 684 u8 nr_new_nacks; /* Number of new NACKs in packet */ 685 u8 nr_rot_new_acks; /* Number of rotated new ACKs */ 686 bool new_low_nack; /* T if new low NACK found */ 687 bool retrans_timeo; /* T if reTx due to timeout happened */ 688 u8 flight_size; /* Number of unreceived transmissions */ 689 /* Place to stash values for tracing */ 690 enum rxrpc_congest_mode mode:8; 691 u8 cwnd; 692 u8 ssthresh; 693 u8 dup_acks; 694 u8 cumulative_acks; 695 }; 696 697 /* 698 * sendmsg() cmsg-specified parameters. 699 */ 700 enum rxrpc_command { 701 RXRPC_CMD_SEND_DATA, /* send data message */ 702 RXRPC_CMD_SEND_ABORT, /* request abort generation */ 703 RXRPC_CMD_ACCEPT, /* [server] accept incoming call */ 704 RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */ 705 }; 706 707 struct rxrpc_call_params { 708 s64 tx_total_len; /* Total Tx data length (if send data) */ 709 unsigned long user_call_ID; /* User's call ID */ 710 struct { 711 u32 hard; /* Maximum lifetime (sec) */ 712 u32 idle; /* Max time since last data packet (msec) */ 713 u32 normal; /* Max time since last call packet (msec) */ 714 } timeouts; 715 u8 nr_timeouts; /* Number of timeouts specified */ 716 bool intr; /* The call is interruptible */ 717 }; 718 719 struct rxrpc_send_params { 720 struct rxrpc_call_params call; 721 u32 abort_code; /* Abort code to Tx (if abort) */ 722 enum rxrpc_command command : 8; /* The command to implement */ 723 bool exclusive; /* Shared or exclusive call */ 724 bool upgrade; /* If the connection is upgradeable */ 725 }; 726 727 #include <trace/events/rxrpc.h> 728 729 /* 730 * af_rxrpc.c 731 */ 732 extern atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs; 733 extern struct workqueue_struct *rxrpc_workqueue; 734 735 /* 736 * call_accept.c 737 */ 738 int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t); 739 void rxrpc_discard_prealloc(struct rxrpc_sock *); 740 struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *, 741 struct rxrpc_sock *, 742 struct sk_buff *); 743 void rxrpc_accept_incoming_calls(struct rxrpc_local *); 744 struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long, 745 rxrpc_notify_rx_t); 746 int rxrpc_reject_call(struct rxrpc_sock *); 747 748 /* 749 * call_event.c 750 */ 751 void rxrpc_propose_ACK(struct rxrpc_call *, u8, u32, bool, bool, 752 enum rxrpc_propose_ack_trace); 753 void rxrpc_process_call(struct work_struct *); 754 755 static inline void rxrpc_reduce_call_timer(struct rxrpc_call *call, 756 unsigned long expire_at, 757 unsigned long now, 758 enum rxrpc_timer_trace why) 759 { 760 trace_rxrpc_timer(call, why, now); 761 timer_reduce(&call->timer, expire_at); 762 } 763 764 /* 765 * call_object.c 766 */ 767 extern const char *const rxrpc_call_states[]; 768 extern const char *const rxrpc_call_completions[]; 769 extern unsigned int rxrpc_max_call_lifetime; 770 extern struct kmem_cache *rxrpc_call_jar; 771 772 struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long); 773 struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *, gfp_t, unsigned int); 774 struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *, 775 struct rxrpc_conn_parameters *, 776 struct sockaddr_rxrpc *, 777 struct rxrpc_call_params *, gfp_t, 778 unsigned int); 779 void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *, 780 struct sk_buff *); 781 void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *); 782 void rxrpc_release_calls_on_socket(struct rxrpc_sock *); 783 bool __rxrpc_queue_call(struct rxrpc_call *); 784 bool rxrpc_queue_call(struct rxrpc_call *); 785 void rxrpc_see_call(struct rxrpc_call *); 786 void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace); 787 void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace); 788 void rxrpc_cleanup_call(struct rxrpc_call *); 789 void rxrpc_destroy_all_calls(struct rxrpc_net *); 790 791 static inline bool rxrpc_is_service_call(const struct rxrpc_call *call) 792 { 793 return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags); 794 } 795 796 static inline bool rxrpc_is_client_call(const struct rxrpc_call *call) 797 { 798 return !rxrpc_is_service_call(call); 799 } 800 801 /* 802 * Transition a call to the complete state. 803 */ 804 static inline bool __rxrpc_set_call_completion(struct rxrpc_call *call, 805 enum rxrpc_call_completion compl, 806 u32 abort_code, 807 int error) 808 { 809 if (call->state < RXRPC_CALL_COMPLETE) { 810 call->abort_code = abort_code; 811 call->error = error; 812 call->completion = compl, 813 call->state = RXRPC_CALL_COMPLETE; 814 trace_rxrpc_call_complete(call); 815 wake_up(&call->waitq); 816 return true; 817 } 818 return false; 819 } 820 821 static inline bool rxrpc_set_call_completion(struct rxrpc_call *call, 822 enum rxrpc_call_completion compl, 823 u32 abort_code, 824 int error) 825 { 826 bool ret; 827 828 write_lock_bh(&call->state_lock); 829 ret = __rxrpc_set_call_completion(call, compl, abort_code, error); 830 write_unlock_bh(&call->state_lock); 831 return ret; 832 } 833 834 /* 835 * Record that a call successfully completed. 836 */ 837 static inline bool __rxrpc_call_completed(struct rxrpc_call *call) 838 { 839 return __rxrpc_set_call_completion(call, RXRPC_CALL_SUCCEEDED, 0, 0); 840 } 841 842 static inline bool rxrpc_call_completed(struct rxrpc_call *call) 843 { 844 bool ret; 845 846 write_lock_bh(&call->state_lock); 847 ret = __rxrpc_call_completed(call); 848 write_unlock_bh(&call->state_lock); 849 return ret; 850 } 851 852 /* 853 * Record that a call is locally aborted. 854 */ 855 static inline bool __rxrpc_abort_call(const char *why, struct rxrpc_call *call, 856 rxrpc_seq_t seq, 857 u32 abort_code, int error) 858 { 859 trace_rxrpc_abort(call->debug_id, why, call->cid, call->call_id, seq, 860 abort_code, error); 861 return __rxrpc_set_call_completion(call, RXRPC_CALL_LOCALLY_ABORTED, 862 abort_code, error); 863 } 864 865 static inline bool rxrpc_abort_call(const char *why, struct rxrpc_call *call, 866 rxrpc_seq_t seq, u32 abort_code, int error) 867 { 868 bool ret; 869 870 write_lock_bh(&call->state_lock); 871 ret = __rxrpc_abort_call(why, call, seq, abort_code, error); 872 write_unlock_bh(&call->state_lock); 873 return ret; 874 } 875 876 /* 877 * Abort a call due to a protocol error. 878 */ 879 static inline bool __rxrpc_abort_eproto(struct rxrpc_call *call, 880 struct sk_buff *skb, 881 const char *eproto_why, 882 const char *why, 883 u32 abort_code) 884 { 885 struct rxrpc_skb_priv *sp = rxrpc_skb(skb); 886 887 trace_rxrpc_rx_eproto(call, sp->hdr.serial, eproto_why); 888 return rxrpc_abort_call(why, call, sp->hdr.seq, abort_code, -EPROTO); 889 } 890 891 #define rxrpc_abort_eproto(call, skb, eproto_why, abort_why, abort_code) \ 892 __rxrpc_abort_eproto((call), (skb), tracepoint_string(eproto_why), \ 893 (abort_why), (abort_code)) 894 895 /* 896 * conn_client.c 897 */ 898 extern unsigned int rxrpc_max_client_connections; 899 extern unsigned int rxrpc_reap_client_connections; 900 extern unsigned long rxrpc_conn_idle_client_expiry; 901 extern unsigned long rxrpc_conn_idle_client_fast_expiry; 902 extern struct idr rxrpc_client_conn_ids; 903 904 void rxrpc_destroy_client_conn_ids(void); 905 int rxrpc_connect_call(struct rxrpc_sock *, struct rxrpc_call *, 906 struct rxrpc_conn_parameters *, struct sockaddr_rxrpc *, 907 gfp_t); 908 void rxrpc_expose_client_call(struct rxrpc_call *); 909 void rxrpc_disconnect_client_call(struct rxrpc_call *); 910 void rxrpc_put_client_conn(struct rxrpc_connection *); 911 void rxrpc_discard_expired_client_conns(struct work_struct *); 912 void rxrpc_destroy_all_client_connections(struct rxrpc_net *); 913 void rxrpc_clean_up_local_conns(struct rxrpc_local *); 914 915 /* 916 * conn_event.c 917 */ 918 void rxrpc_process_connection(struct work_struct *); 919 920 /* 921 * conn_object.c 922 */ 923 extern unsigned int rxrpc_connection_expiry; 924 extern unsigned int rxrpc_closed_conn_expiry; 925 926 struct rxrpc_connection *rxrpc_alloc_connection(gfp_t); 927 struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *, 928 struct sk_buff *, 929 struct rxrpc_peer **); 930 void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *); 931 void rxrpc_disconnect_call(struct rxrpc_call *); 932 void rxrpc_kill_connection(struct rxrpc_connection *); 933 bool rxrpc_queue_conn(struct rxrpc_connection *); 934 void rxrpc_see_connection(struct rxrpc_connection *); 935 void rxrpc_get_connection(struct rxrpc_connection *); 936 struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *); 937 void rxrpc_put_service_conn(struct rxrpc_connection *); 938 void rxrpc_service_connection_reaper(struct work_struct *); 939 void rxrpc_destroy_all_connections(struct rxrpc_net *); 940 941 static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn) 942 { 943 return conn->out_clientflag; 944 } 945 946 static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn) 947 { 948 return !rxrpc_conn_is_client(conn); 949 } 950 951 static inline void rxrpc_put_connection(struct rxrpc_connection *conn) 952 { 953 if (!conn) 954 return; 955 956 if (rxrpc_conn_is_client(conn)) 957 rxrpc_put_client_conn(conn); 958 else 959 rxrpc_put_service_conn(conn); 960 } 961 962 static inline void rxrpc_reduce_conn_timer(struct rxrpc_connection *conn, 963 unsigned long expire_at) 964 { 965 timer_reduce(&conn->timer, expire_at); 966 } 967 968 /* 969 * conn_service.c 970 */ 971 struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *, 972 struct sk_buff *); 973 struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *, gfp_t); 974 void rxrpc_new_incoming_connection(struct rxrpc_sock *, 975 struct rxrpc_connection *, struct sk_buff *); 976 void rxrpc_unpublish_service_conn(struct rxrpc_connection *); 977 978 /* 979 * input.c 980 */ 981 int rxrpc_input_packet(struct sock *, struct sk_buff *); 982 983 /* 984 * insecure.c 985 */ 986 extern const struct rxrpc_security rxrpc_no_security; 987 988 /* 989 * key.c 990 */ 991 extern struct key_type key_type_rxrpc; 992 extern struct key_type key_type_rxrpc_s; 993 994 int rxrpc_request_key(struct rxrpc_sock *, char __user *, int); 995 int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int); 996 int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time64_t, 997 u32); 998 999 /* 1000 * local_event.c 1001 */ 1002 extern void rxrpc_process_local_events(struct rxrpc_local *); 1003 1004 /* 1005 * local_object.c 1006 */ 1007 struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *); 1008 struct rxrpc_local *rxrpc_get_local(struct rxrpc_local *); 1009 struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *); 1010 void rxrpc_put_local(struct rxrpc_local *); 1011 struct rxrpc_local *rxrpc_use_local(struct rxrpc_local *); 1012 void rxrpc_unuse_local(struct rxrpc_local *); 1013 void rxrpc_queue_local(struct rxrpc_local *); 1014 void rxrpc_destroy_all_locals(struct rxrpc_net *); 1015 1016 /* 1017 * misc.c 1018 */ 1019 extern unsigned int rxrpc_max_backlog __read_mostly; 1020 extern unsigned long rxrpc_requested_ack_delay; 1021 extern unsigned long rxrpc_soft_ack_delay; 1022 extern unsigned long rxrpc_idle_ack_delay; 1023 extern unsigned int rxrpc_rx_window_size; 1024 extern unsigned int rxrpc_rx_mtu; 1025 extern unsigned int rxrpc_rx_jumbo_max; 1026 extern unsigned long rxrpc_resend_timeout; 1027 1028 extern const s8 rxrpc_ack_priority[]; 1029 1030 /* 1031 * net_ns.c 1032 */ 1033 extern unsigned int rxrpc_net_id; 1034 extern struct pernet_operations rxrpc_net_ops; 1035 1036 static inline struct rxrpc_net *rxrpc_net(struct net *net) 1037 { 1038 return net_generic(net, rxrpc_net_id); 1039 } 1040 1041 /* 1042 * output.c 1043 */ 1044 int rxrpc_send_ack_packet(struct rxrpc_call *, bool, rxrpc_serial_t *); 1045 int rxrpc_send_abort_packet(struct rxrpc_call *); 1046 int rxrpc_send_data_packet(struct rxrpc_call *, struct sk_buff *, bool); 1047 void rxrpc_reject_packets(struct rxrpc_local *); 1048 void rxrpc_send_keepalive(struct rxrpc_peer *); 1049 1050 /* 1051 * peer_event.c 1052 */ 1053 void rxrpc_error_report(struct sock *); 1054 void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace, 1055 rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t); 1056 void rxrpc_peer_keepalive_worker(struct work_struct *); 1057 1058 /* 1059 * peer_object.c 1060 */ 1061 struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *, 1062 const struct sockaddr_rxrpc *); 1063 struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_sock *, struct rxrpc_local *, 1064 struct sockaddr_rxrpc *, gfp_t); 1065 struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t); 1066 void rxrpc_new_incoming_peer(struct rxrpc_sock *, struct rxrpc_local *, 1067 struct rxrpc_peer *); 1068 void rxrpc_destroy_all_peers(struct rxrpc_net *); 1069 struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *); 1070 struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *); 1071 void rxrpc_put_peer(struct rxrpc_peer *); 1072 void rxrpc_put_peer_locked(struct rxrpc_peer *); 1073 1074 /* 1075 * proc.c 1076 */ 1077 extern const struct seq_operations rxrpc_call_seq_ops; 1078 extern const struct seq_operations rxrpc_connection_seq_ops; 1079 extern const struct seq_operations rxrpc_peer_seq_ops; 1080 1081 /* 1082 * recvmsg.c 1083 */ 1084 void rxrpc_notify_socket(struct rxrpc_call *); 1085 int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int); 1086 1087 /* 1088 * rxkad.c 1089 */ 1090 #ifdef CONFIG_RXKAD 1091 extern const struct rxrpc_security rxkad; 1092 #endif 1093 1094 /* 1095 * security.c 1096 */ 1097 int __init rxrpc_init_security(void); 1098 void rxrpc_exit_security(void); 1099 int rxrpc_init_client_conn_security(struct rxrpc_connection *); 1100 int rxrpc_init_server_conn_security(struct rxrpc_connection *); 1101 1102 /* 1103 * sendmsg.c 1104 */ 1105 int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t); 1106 1107 /* 1108 * skbuff.c 1109 */ 1110 void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *); 1111 void rxrpc_packet_destructor(struct sk_buff *); 1112 void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace); 1113 void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace); 1114 void rxrpc_eaten_skb(struct sk_buff *, enum rxrpc_skb_trace); 1115 void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace); 1116 void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace); 1117 void rxrpc_purge_queue(struct sk_buff_head *); 1118 1119 /* 1120 * sysctl.c 1121 */ 1122 #ifdef CONFIG_SYSCTL 1123 extern int __init rxrpc_sysctl_init(void); 1124 extern void rxrpc_sysctl_exit(void); 1125 #else 1126 static inline int __init rxrpc_sysctl_init(void) { return 0; } 1127 static inline void rxrpc_sysctl_exit(void) {} 1128 #endif 1129 1130 /* 1131 * utils.c 1132 */ 1133 int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *); 1134 1135 static inline bool before(u32 seq1, u32 seq2) 1136 { 1137 return (s32)(seq1 - seq2) < 0; 1138 } 1139 static inline bool before_eq(u32 seq1, u32 seq2) 1140 { 1141 return (s32)(seq1 - seq2) <= 0; 1142 } 1143 static inline bool after(u32 seq1, u32 seq2) 1144 { 1145 return (s32)(seq1 - seq2) > 0; 1146 } 1147 static inline bool after_eq(u32 seq1, u32 seq2) 1148 { 1149 return (s32)(seq1 - seq2) >= 0; 1150 } 1151 1152 /* 1153 * debug tracing 1154 */ 1155 extern unsigned int rxrpc_debug; 1156 1157 #define dbgprintk(FMT,...) \ 1158 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 1159 1160 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1161 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1162 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 1163 #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__) 1164 #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__) 1165 1166 1167 #if defined(__KDEBUG) 1168 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 1169 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 1170 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 1171 #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__) 1172 #define _net(FMT,...) knet(FMT,##__VA_ARGS__) 1173 1174 #elif defined(CONFIG_AF_RXRPC_DEBUG) 1175 #define RXRPC_DEBUG_KENTER 0x01 1176 #define RXRPC_DEBUG_KLEAVE 0x02 1177 #define RXRPC_DEBUG_KDEBUG 0x04 1178 #define RXRPC_DEBUG_KPROTO 0x08 1179 #define RXRPC_DEBUG_KNET 0x10 1180 1181 #define _enter(FMT,...) \ 1182 do { \ 1183 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \ 1184 kenter(FMT,##__VA_ARGS__); \ 1185 } while (0) 1186 1187 #define _leave(FMT,...) \ 1188 do { \ 1189 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \ 1190 kleave(FMT,##__VA_ARGS__); \ 1191 } while (0) 1192 1193 #define _debug(FMT,...) \ 1194 do { \ 1195 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \ 1196 kdebug(FMT,##__VA_ARGS__); \ 1197 } while (0) 1198 1199 #define _proto(FMT,...) \ 1200 do { \ 1201 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \ 1202 kproto(FMT,##__VA_ARGS__); \ 1203 } while (0) 1204 1205 #define _net(FMT,...) \ 1206 do { \ 1207 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \ 1208 knet(FMT,##__VA_ARGS__); \ 1209 } while (0) 1210 1211 #else 1212 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1213 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1214 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 1215 #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__) 1216 #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__) 1217 #endif 1218 1219 /* 1220 * debug assertion checking 1221 */ 1222 #if 1 // defined(__KDEBUGALL) 1223 1224 #define ASSERT(X) \ 1225 do { \ 1226 if (unlikely(!(X))) { \ 1227 pr_err("Assertion failed\n"); \ 1228 BUG(); \ 1229 } \ 1230 } while (0) 1231 1232 #define ASSERTCMP(X, OP, Y) \ 1233 do { \ 1234 __typeof__(X) _x = (X); \ 1235 __typeof__(Y) _y = (__typeof__(X))(Y); \ 1236 if (unlikely(!(_x OP _y))) { \ 1237 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1238 (unsigned long)_x, (unsigned long)_x, #OP, \ 1239 (unsigned long)_y, (unsigned long)_y); \ 1240 BUG(); \ 1241 } \ 1242 } while (0) 1243 1244 #define ASSERTIF(C, X) \ 1245 do { \ 1246 if (unlikely((C) && !(X))) { \ 1247 pr_err("Assertion failed\n"); \ 1248 BUG(); \ 1249 } \ 1250 } while (0) 1251 1252 #define ASSERTIFCMP(C, X, OP, Y) \ 1253 do { \ 1254 __typeof__(X) _x = (X); \ 1255 __typeof__(Y) _y = (__typeof__(X))(Y); \ 1256 if (unlikely((C) && !(_x OP _y))) { \ 1257 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1258 (unsigned long)_x, (unsigned long)_x, #OP, \ 1259 (unsigned long)_y, (unsigned long)_y); \ 1260 BUG(); \ 1261 } \ 1262 } while (0) 1263 1264 #else 1265 1266 #define ASSERT(X) \ 1267 do { \ 1268 } while (0) 1269 1270 #define ASSERTCMP(X, OP, Y) \ 1271 do { \ 1272 } while (0) 1273 1274 #define ASSERTIF(C, X) \ 1275 do { \ 1276 } while (0) 1277 1278 #define ASSERTIFCMP(C, X, OP, Y) \ 1279 do { \ 1280 } while (0) 1281 1282 #endif /* __KDEBUGALL */ 1283